Overview
The AD7715AR-5REEL, produced by Analog Devices Inc., is a 16-bit Sigma-Delta analog-to-digital converter (ADC) designed for low-frequency measurement applications. This component serves as a complete analog front end, capable of accepting low-level input signals directly from transducers and outputting a serial digital word. It employs a Sigma-Delta conversion technique to achieve up to 16 bits of no missing codes performance. The AD7715 features a programmable gain front end, differential analog and reference inputs, and operates from a single supply voltage of either 3 V or 5 V. It is ideal for use in smart, microcontroller, or DSP-based systems due to its low power consumption and versatile serial interface.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16 bits |
| Nonlinearity | ±0.0015% |
| Programmable Gain | 1, 2, 32, 128 |
| Input Signal Ranges (Unipolar) | 0 mV to 20 mV, 0 mV to 80 mV, 0 V to 1.25 V, 0 V to 2.5 V |
| Input Signal Ranges (Bipolar) | ±20 mV, ±80 mV, ±1.25 V, ±2.5 V |
| Supply Voltage | 3 V or 5 V |
| Supply Current | 450 µA maximum @ 3 V supplies |
| Standby Current | |
| Package Type | 16-lead SOIC, PDIP, TSSOP |
| Operating Temperature | -40°C to +85°C |
| Data Interface | SPI, QSPI, MICROWIRE, DSP-compatible |
| Sampling Rate | 50 Hz to 600 Hz |
Key Features
- Programmable gain front end with gains of 1, 2, 32, and 128.
- Differential analog and reference inputs.
- Operates from a single supply voltage of 3 V or 5 V.
- Low supply current: 450 µA maximum at 3 V supplies.
- Low-pass filter with programmable output update rate.
- Three-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.
- Ability to buffer the analog input.
- Self-calibration and system calibration options to eliminate gain and offset errors.
- Low power consumption with a standby current of less than 10 µA.
- Available in 16-lead SOIC, PDIP, and TSSOP packages.
Applications
The AD7715 is suitable for various low-frequency measurement applications, including:
- Smart, microcontroller, or DSP-based systems.
- Strain gage and transducer interfaces.
- Industrial automation and control systems.
- Medical devices requiring high precision analog-to-digital conversion.
- Automotive and aerospace applications where low power and high accuracy are critical.
Q & A
- What is the resolution of the AD7715?
The AD7715 has a resolution of 16 bits with no missing codes.
- What are the programmable gain settings of the AD7715?
The AD7715 has programmable gain settings of 1, 2, 32, and 128.
- What is the supply voltage range for the AD7715?
The AD7715 operates from a single supply voltage of either 3 V or 5 V.
- What is the maximum supply current of the AD7715 at 3 V supplies?
The maximum supply current is 450 µA at 3 V supplies.
- What types of packages are available for the AD7715?
The AD7715 is available in 16-lead SOIC, PDIP, and TSSOP packages.
- What is the operating temperature range of the AD7715?
The operating temperature range is -40°C to +85°C.
- What data interfaces are supported by the AD7715?
The AD7715 supports SPI, QSPI, MICROWIRE, and DSP-compatible interfaces.
- Can the AD7715 perform self-calibration?
Yes, the AD7715 has self-calibration and system calibration options to eliminate gain and offset errors.
- What is the standby current of the AD7715?
The standby current is less than 10 µA.
- What are the typical applications of the AD7715?
The AD7715 is typically used in smart, microcontroller, or DSP-based systems, strain gage and transducer interfaces, and other low-frequency measurement applications.
